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DTC P1294: Target Idle Not Reached: Testing

    NOTE: All MAP Sensor, IAC and/or TP Sensor DTCs present must be diagnosed before continuing with this test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
  1. Turn ignition on, engine not running. With the DRBIII®, read DTCs. Is the Good Trip counter displayed and equal to zero? If yes, go to next step. If no, go to step INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM.
  2. Inspect the Intake Manifold for vacuum leaks. Inspect the Power Brake Booster for any vacuum leaks. Inspect the Closed Crankcase Ventilation system for proper operation or any vacuum leaks. Were any problems found? If yes, repair vacuum leak as necessary. If no, go to next step.
  3. Inspect the Air Induction System for dirty air cleaner, foreign material trapped in the air intake tube, etc. Also check for leaks in the air intake tube connection, air cleaner housing, etc. Were any problems found? If yes, repair or replace as necessary. If no, go to next step.
  4. Turn the ignition off. Inspect the throttle body plate carbon build-up or other restrictions. Inspect the throttle linkage for binding and smooth operation. Ensure the throttle plate is resting on the stop at idle. Remove IAC, inspect the pintle and its seating surface inside the throttle body. Were any problems found? If yes, clean and repair the reason for the carbon build-up and/or replace the throttle body as needed. If no, go to next step.
  5. Ensure ignition is off. Disconnect the IAC Motor harness connector and PCM harness connectors. Measure the resistance of the IAC Driver circuits from the IAC Motor harness connector to the PCM harness connector. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the IAC Driver circuit(s) for an open.
    6. NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
  6. Using the wiring diagram as a guide, inspect the wire harness and connectors. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace PCM. Program the new PCM. See PROGRAMMING .
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